Investigation of some nature and synthetic amino acid compounds by EPR

This study consist of four parts. In the first part, gamma irradiation of L-Alanine ethyl ester powder crystals were investigated by EPR. The radical obtained by gamma irradiated has been found as CHB3B?H(COOCB2BHB5B). Interacted of unpaired electron with ?- proton and methyl protons was investigated. Hyperfine coupling and g values were determined by the measurement of spectra. In the second part, the radiation centre of paramagnetic was attribute to the CHB2B?H(COOH) by gamma irradiation in the L-Arginine powder crystals. It was found that the unpaired electron interacted with ?-proton and methylene protons. The spin Hamiltonian parameters of radical have been calculated. In the third part, the radical by gamma irradiated on the Alanine-L-glutamine powder crystal were attribute to the CHB2B?NH(COOH). It has been determined that the unpaired electron interacted with protons of CHB2B, NH group and N nuclei. In the fourth part, the EPR spectra of gamma irradiated DL-?-Amino-n-butyric Acid powder crystals has been investigated. By the help of this investigation and McKelvey simulation program the radical occurred by gamma irradiation was found as ?HCHB3